Guilty of Romance (2011)

Love is hell.

In a Tokyo love hotel district, a woman is found dead in a derelict apartment. As police investigate, a romance novelist's wife lives a life that seems simply a daily repetition without romance. To break away from the loveless monotony, she follows her desires and becomes a nude model enacting sex in front of a camera. Soon, she meets a mentor and begins selling her body to strangers, while at home, she hides behind the façade that she's still the doting wife she's supposed to be.